Caltric 2 Deck Blade Compatible with John Deere 102 105 107 115 125 135 D100 D105 (21 3/8" L - 2.6" W)

What It Is

This is a replacement lawn mower blade set (typically 2 blades) designed for 42-inch cutting decks on select John Deere lawn tractors. It’s an aftermarket alternative to OEM part GY20810, intended for residential mowing on flat to moderate terrain.

Fitment & Compatibility

Before buying, confirm your deck size is 42 inches – this blade only fits decks that require a 21 3/8-inch length and 2.6-inch width. Check your model number: this fits John Deere 100-series (102, 105, 107, 115, 125, 135) and D100-series (D100, D105) tractors. It does NOT fit D110, D120, D125, D130, D140, D150, D155, D160, D170, or any X300-series decks. Measure your existing blade’s length (center hole to cutting tip) and width (flat part). Verify the center hole diameter is 1 inch (common for these models). This is an aftermarket part – it’s not OEM, so blade thickness and balance may differ slightly from factory blades.

Key Things to Know

• Quality: Caltric blades are budget-friendly but often require balancing before installation. Check for warping or uneven edges out of the box.
• Installation difficulty: Easy – remove the old blade with a socket wrench, note the washer/bolt orientation, and torque the new blade to 40-50 ft-lbs. Use a blade removal tool to hold the spindle.
• Common gotcha: These blades are stamped steel, not hardened like OEM. They may dull faster if you hit rocks, roots, or thick weeds. Inspect after every 10 hours of use.
• Fitment trick: If your deck has a raised center (discharge tunnel), verify blade clearance – the 2.6-inch width can rub on some decks if the spindle is worn.

Should You Buy It

If you have a 42-inch John Deere 100 or D100 series and need a low-cost replacement for regular grass cutting (no heavy debris or commercial use), this is a solid budget pick. But if you mow over rough ground, need maximum durability, or want OEM balance, spend more on a factory blade.